Circuit Diagrams; Smps Circuit Diagram - LG DP132 Service Manual

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM

12
11
L501 L501
NC NC
10
D502 D502 D503 D503
optional
CE501 CE501 LF501 LF501
+ +
15uF/500V 15uF/500V NC/20mH NC/20mH
9
D501 D501 D504 D504
FB501 FB501
NC NC
8
7
F501 F501
6 10ohm/2W 10ohm/2W
5
4
CN501 CN501
2PIN/7.92mm 2PIN/7.92mm
3
2
CAUTION:
Warning
Danger if fuse is incorrectly replaced.
Parts that are shaded are critical with
Replace only with the type identical to fuse rating respect to risk of fire or electrical shock.
and(or) model name described in main label.
1
A B C D
C501 C501
CE502 CE502
+ +
15uF/500V 15uF/500V
U501 U501
5 4
S Drain
3
NC
6
S
2
BP/M
7
S
CE503 CE503
ZD502 ZD502
+ +
8 1 10uF/50V 10uF/50V
S EN/UV
C503 C503
NC NC
TNY176 TNY176
R506 R506
R511 R511
100K 100K
E F G H I
3-27
IMPORTANT SAFETY
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD
DESIGN BE MODIFIED OR ALTERED WITHOUT
PERMISSION FROM THE LG CORPORATION. ALL
COMPONENTS SHOULD BE REPLACED ONLY WITH
TYPES IDENTICAL TO THOSE IN THE ORIGINAL
CIRCUIT. SPECIAL COMPONENTS ARE SHADED
7
T501 T501
6
R502 R502 R503 R503
150K 150K 150K 150K
4
D505 D505
8
1N4007/1A/1000V 1N4007/1A/1000V
10
R501 R501 D506 D506
10K 10K FR104/1A/400V FR104/1A/400V
2
D508 D508
CE504 CE504 11
+ +
10uF/50V 10uF/50V SR360/3A/60V SR360/3A/60V
1 9
680 680
R509 R509
470 470
ZD501 ZD501 U502 U502
LTV-817S-B LTV-817S-B
BZX79C9V1 BZX79C9V1
U503 U503
CY501 CY501 1000pF/250VAC 1000pF/250VAC
J K L M
3-28
ON THE SCHEMATIC FOR EASY IDENTIFICATION.
THE ORIGINAL THIS CIRCUIT DIAGRAM MAY OCCASIONALLY
DIFFER FROM THE ACTUAL CIRCUIT USED. THIS
WAY, IMPLEMENTATION OF THE LATEST SAFETY
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.
L502 L502 6.8uH 6.8uH
CE506 CE506 CE507 CE507
+ + + +
R505 R505
1500uF/16V 1500uF/16V 470uF/16V 470uF/16V
12.4K/1% 12.4K/1%
R508 R508
2.2K 2.2K
R510 R510 10K 10K C502 C502 0.1uF/50V/X7R 0.1uF/50V/X7R
R513 R513 R507 R507
1
H431 H431
NC NC 12K/1% 12K/1%
N O P Q
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
<IREF>
+5V
GND_POWER
R S T